Fuse for projectiles



,Abril 13, 1937- H. G. TowNER 2,076,602

` FUSE FOR PROJECTILES Filed June 24, 1956 Aitor-nay A Patented Apr. 1'3, 1937 UNITED' STATES; PATENT oFFlc `Fnsi: Foa rnomo'rmns Harold G. Towncr, New Haven, Conn. Application June 24, 1936, ser-m No. 81,011 claims. (ci. 1oz-a9 (Granted under the act of March 3,

amended April 30, 1928; 370 0. G. 757) The invention described herein maybe manufactured and usedby or for the Governmentfor governmental purposes, without the payment to me of any royalty thereon. I

5 This invention relates to a fuse for projectiles. e purpose of the inventionis to provide a bore safe fuse especially adapted for a projectile that is 5to be red from a smooth bore mortar. This is accomplished by a simple and inexpensive arrangementnin which a*y cap holding the ring mechanism in safe position is removed after the projectile leaves the bore of the gun.

To these and other ends, the invention consists in the construction, arrangement and combinaition of elements,

specification.

A practical embodiment of the invention is illustrated in the accompanying drawing which is 2O a longitudinal sectional view of the improved fuse with the parts in unarmed or safe position.

Referring tothe drawing by characterswof refv erence, the fuse casing comprises a body 5having a reduced rear end 6 whereby it is threadedly attached to a projectile A cup 8 threadedly .car

ried by the rear end of the fuse body is disposed within` the projectile and contains a booster charge 9. The fuse body 5 is formed with an axial passage .30 I0? and an intersecting transverse passage II. A

.carrier comprising 'a bolt I2 a primer detonator I3 is formed with an aperture Il for receiving the inner end of a ring pin I5 disposed in the upper or outer portion of the axial passage I0. The ring pin, -when received in th 'aperture I4, holds Athe bolt in the unarmed or safe position with the primer detonator I3 at. oneside of the axial passage II) and out of line with the firing pin and a charge I 6 in the lower or inner part of the axial passage. A spring I1 conned between the bolt and a plug I8 threaded to the body 5 serves to move the when 'the iiring pin is withdrawn so as to position the primer detonator betweenthe firing pin and charge I6.

'I'he front part of the body 5 is formed with a cavity I9 for receiving an inverted cup 2l to which therring pin I5 is attached. l A spring 2I surrounding the ring pin and confined between the oor of the cavity and the closediront end of the cup normally tends to move the cup to an extruded position and ing pinA from the aperture Il of the bolt I2 and place it in armed or ring position. vA .flange 22 55 on.v the inner end of the cup20 serves as a guide Spring byemeans of described hereinafter and pointed out in the claims forming' a part oi thisj bolt to the armed position I3 axially of the fuse and.

thereby withdraw the rand is adapted to engage a ring 23 fixed m the.

mouth of'the cavity to limit extrusion of the cup.

The cup 20 is normally held in ring position within the body 5 and against the action of the a cap 24 which-is threaded on the reduced front end 25 of the body. The cup 20 is of a predetermined height to maintain a clearance 26 between the cap and the shoulder of the body and thereby prevent jamming and assure rotation of the cap. A propeller 21 is secured to the front face of the cap by means of rivets 28.

The fuse is safe when the parts'are in the retheiiiring pin I5 inthe bolt I2. When a projectile carrying the fuse is iired from a mortar the propeller is rotated by the airfand the cap 24 is unscrewed from the fuse body 5. The cup 20 carrying the ring pin follows the cap under the influence of its spring until arrested by the ring 23. 'I'he bolt I2 moves to' armed position so that. on impact the ring pin will be driven into the primer detonator I3. I

'I'he threaded connection between the cap 24 and fuse body 5 is of suiicient length to prevent removal of the cap while the fuse is in the bore of the gun.

I claim: v

1. A fuse including a body having areduced front end with a cavity, an inverted cup in the cavity and having a flange on its inn'er end, a

` spring normally tending to move the cup to an a iring pin xed to the cup, a cap threaded on thereduced front end of the body ,and holding the cup in retracted position within thecavity, a propeller on the cap, a bolt mounted in the body for sliding movement transversely thereof, a primer detonator in the bolt, a spring for moving the bolt to armed posi ion, said bolt normally held in unarmed position bythe ring pin when the-cap is in place on the fuse body.

2. A fuse including a body, a ring pin in the body, a spring, normally tending to move the firing pin to an extruded ring position, means for limiting extrusion of'the ring pin. a cap threaded on the front end of the body and ho1ding the tiring pin in retracted position, Aa propeller on the cap, a bolt mounted in the body for lation shown in the drawing, the cap 24 holding 3. A fuse including a body. a primer detonator carrier in the body, a ring pin in the body and normally holding the carriern unarmed position, a cap threaded on the body and removable during flight, said cap holding the tiring pin to maintain the carrier in unarmed position, and means for moving the ring pin to release the carrier when the cap is removed. A

4. A fuse including a body having a cavity in its front end, an inverted cap in the cavity and having a. iange on its inner end, a spring normally tending to move the cup to an extruded ring position, a ring fixed in the mouth of the cavity and limiting movement of the cup, a ring pin xed to the cup, a cap threaded on the front 4 end of the body and holding the cup within the cavity against the action of its spring, and means on the cap whereby the cap is removed during ilight. A

5. A fuse including a body, a ring pin in the body, a spring normally tending to move the firing pin to an extruded ring position, a cap threaded on the body and removable during ight, said cap holding the iiring pin against the action of its spring.

HAROLD G. TOWNER. 

